You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

(CNN) On radio, most pundits and polls scored the September 26, 1960, debate between presidential candidates Richard M. Nixon and John F. Kennedy a draw, with some giving the Republican contender the edge. But on television, it was no contest. Throughout the 60-minute program set in a Chicago TV studio, the 43-year-old Kennedy "looked to be radiating health," said presidential historian Robert Gilbert. Kennedy wore a dark suit and had a wide smile and vivid tan. Nixon, on the other hand, appeared pale and a bit listless. He had just gotten out of the hospital, where he had lost weight after a knee injury. In a gray, ill-fitting suit and hastily added pancake makeup, Nixon looked -- even if he did not necessarily sound -- a pale shadow of the aggressive, composed senator from Massachusetts.The first televised U.S. presidential debate happened on September 26, 1960A youthful and healthy-looking JFK won the TV debate over NixonAbout 40% of Americans tuned into the "Great Debates" of 1960 between Kennedy and Nixon 
 Questions:Politicians, careful to avoid _'s pitfalls, have stressed style as well as substance in recent decades, knowing that their words and actions not only will appear in newspaper accounts but will be repeated over and over in Americans' living rooms. (A) CNN (B) Richard M. Nixon (C) John F. Kennedy (D) Republican (E) Chicago (F) Kennedy (G) Robert Gilbert (H) Massachusetts (I) U.S. (J) JFK (K) Americans (L) Great Debates
Output:
(B)